"Here AICH will care for complete data integrity with a minimum cost of redownloading or overhead by creating much finer hashes."

"This time our starting point are the 9.28 MB parts in a file. Each part is divided into 180 KB blocks, resulting in 53 blocks per part and for each block a hash value is calculated using the SHA1 hash algorithm. These values are called Block Hashes and form the lowest level of a complete AICH Hashset."